Mobile app development for US companies from Figma to both stores, under your accounts.

SpikeSecure is a mobile app development company in Coimbatore, India, that builds iOS and Android apps for US startups, SMEs and product teams remotely. Most US apps are built on Flutter (one codebase for both stores) with a NestJS backend on AWS US regions; React Native when your web team is React-first; Swift and Kotlin where a native feature demands it. Apps are published under your own Apple Developer and Google Play accounts, so ownership never passes through us.

The category we know best is real-time: video and audio calling, live rooms, per-minute wallets, payouts, KYC and AI moderation, because we build and run Local Friends, our own calling platform, on exactly that stack. US teams building video consultation, dating, social, party or creator apps get those modules as a starting point rather than a blank page; see video calling app development.

• Indicative cost: simple apps ₹4–8 lakh, mid-complexity apps ₹8–15 lakh, platform apps ₹15–30 lakh on our published Indian pricing (roughly USD 4,500–34,000, an indicative conversion roughly ₹87 per US dollar). Confirmed in a written USD proposal.
• Timeline: simple apps 8–12 weeks, production apps with payments and real-time features 12–20 weeks, complex platforms 20–32 weeks; TestFlight and internal testing before public release.
• What is included: discovery and written scope, UX and UI, Flutter or React Native apps, backend and admin, payments and notifications, analytics, App Store and Play Store listings and submission, launch support and a 30-day warranty.
• Stack: Flutter or React Native; NestJS or Node.js on PostgreSQL; AWS us-east-1 or us-west-2; Stripe, Apple Pay and Google Pay; Agora or LiveKit for real-time media; Firebase for push and analytics; Codemagic or Fastlane for releases.
• Also searched as: offshore mobile app development USA, outsource app development to India, Flutter app development company for US startups, React Native developers for US companies, video calling app development for US companies, party app developers.
• Related: USA hub, custom software development for US companies, mobile app developers (India page), video calling app development, Flutter app development, Local Friends technical case study, international clients

US app users are the most demanding in the world on polish and the least tolerant of a slow launch: reviews arrive within hours, Apple's review guidelines are applied strictly, and privacy labels, tracking consent and payment rules are enforced. Building for the US means treating store compliance and privacy as scope, not as a launch-week scramble.

Store accounts and compliance

Apps are published under your Apple Developer Program and Google Play Console accounts. We prepare privacy nutrition labels and the Play data-safety form, App Tracking Transparency prompts, sign-in-with-Apple where third-party login is offered, account-deletion flows, and in-app purchase handling that follows the store rules; content and moderation policies for user-generated content are written into the scope because both stores require them.

Payments

Stripe with Apple Pay and Google Pay for physical goods and services; StoreKit 2 and Play Billing for digital goods and subscriptions, through RevenueCat where it saves time; Stripe Connect or RazorpayX-style payout rails for marketplaces and creator apps.

Privacy and security

There is no single federal privacy law at the time of writing (September 2026); we design for the California CCPA/CPRA and the similar state laws (consent, access and deletion requests, do-not-sell links), HIPAA safeguards when health data is involved (BAA-backed hosting, audit logs, encryption), COPPA for under-13 audiences, PCI DSS scope kept inside Stripe, ADA-driven WCAG 2.1 AA accessibility, and CAN-SPAM and TCPA rules for email and SMS. Your counsel signs off; we implement.

Hosting

AWS us-east-1 (N. Virginia) or us-west-2 (Oregon), Google Cloud Iowa or Oregon, or Vercel, in your accounts with your billing; RDS or managed Postgres, S3 with encryption at rest, CloudFront or Cloudflare in front. Data stays in US regions unless you choose otherwise.

Time zones and releases

Our 09:30–18:30 IST day is 00:00–09:00 Eastern and 21:00–06:00 Pacific, so we agree a daily live window (typically 07:00–09:00 Eastern) and keep the rest asynchronous in writing. Releases are scheduled for your quiet hours with staged rollouts on Google Play and phased release on the App Store.

• Payments. Stripe (Checkout, Billing, Connect for marketplaces, Stripe Tax), PayPal and Braintree, Authorize.net for legacy merchant accounts, Apple Pay and Google Pay; ACH debits through Stripe or Plaid where you need bank transfers. Set up in accounts you own, with webhooks, refunds, disputes and reconciliation tested in the sandbox before go-live.
• Accounting and CRM. QuickBooks Online and Xero for invoices, payments and customer sync; HubSpot and Salesforce through their REST APIs and webhooks for leads, deals and activity sync; Zapier or Make where a native connector is cheaper than code. We migrate data from spreadsheets or a previous CRM as part of scope.
• Local channels and APIs. Twilio or Telnyx for SMS and voice, SendGrid or Postmark for email, Shippo or EasyPost for USPS, UPS and FedEx labels, Avalara or Stripe Tax for state sales tax, Plaid for bank links, Google Maps and Mapbox for geo; all in your accounts.
• What already runs in production. Per-minute wallets, Razorpay checkout and RazorpayX payouts, Agora audio and video, Flutter and Next.js clients and a NestJS API on AWS in Local Friends; Razorpay checkout, WhatsApp Business API follow-ups and role-based dashboards in the six published case studies. Swapping Razorpay for Stripe is a gateway adapter and a sandbox test run, not a new architecture. No US client is named on this site and we hold no SOC 2 or ISO 27001 certification.

SpikeSecure has one office, at CHIL SEZ IT Park, Saravanampatti, Coimbatore, India. US clients are served remotely by that engineering team; there is no USA office, entity or local staff, and we do not claim one.

• Working hours. Our 09:30–18:30 IST day is 00:00–09:00 Eastern and 21:00–06:00 Pacific, so we agree a daily live window (typically 07:00–09:00 Eastern) and keep the rest asynchronous in writing.
• Commercials. A written, fixed-scope proposal before work starts. Quoted and invoiced in USD through Stripe or Wise, or in INR if you prefer; the fixed price is set in the invoicing currency. We are an Indian entity and charge no US sales tax; your accountant advises on any use-tax treatment.
• NDA and ownership. A mutual NDA is signed before discovery. Source code lives in a GitHub organisation you own; cloud, app store and domain accounts are in your name from day one; the intellectual property in the delivered work is yours.
• Communication. A named project lead, a shared channel on Slack or WhatsApp, weekly demos on a staging URL (recorded for absent stakeholders), a written status note every Friday and GitHub access throughout.
• Hosting. AWS us-east-1 (N. Virginia) or us-west-2 (Oregon), Google Cloud Iowa or Oregon, or Vercel, in your accounts with your billing; RDS or managed Postgres, S3 with encryption at rest, CloudFront or Cloudflare in front. Data stays in US regions unless you choose otherwise.
• After launch. A 30-day warranty on every build, then optional maintenance with monthly health reports, or a documented handover to your in-house team or a local vendor.